Fastener supplying apparatus



March 7, 1933. s. L. GOOKIN FASTENER SUPPLYING APPARATUS Original FiledJuly 21/1930 3 Sheets-Sheet l WVE/VTUF March 7, 1933. s; L. GOOKINFASTENER SUPPLYING APPARATUS Original Filed July 21, 1930 3 Sheets-Sheet2 Maffl? 1 933. 5 GQQKIN 1,99%,055

FASTENER SUPPLYING APPARATUS Original Filed July 21, 1930 5 Sheets-Sheet'5 Patented Mar. 7, 1933 UNITED STATES PATENT OFFICE SYLVESTER LEO.GOOKIN, OF QUINCY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERYCORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF- NEW JERSEYFASTENER SUPPLYING- APPARATUS Original application filed July 21, 1930,Serial No. 469,432. Divided and this application filed. July 23,

1931. Serial No. 552,698. I

This invention relates to machines for inserting fasteners and moreparticularly to means for supplying fasteners to the mechanism forinserting them. The invention is herein illustrated as embodied in aform designed especially for supplying eyelets in a duplex eyeletingmachine but in certain aspects the invention is not limited to machinesof the duplex type nor to eyelets as the fasteners to be supplied.Nevertheless, for convenience in setting forth the novel features of theinvention, the latter'is herein described in terms relating to duplexeyeleting machines. The subject-matter of the invention has heretoforebeen illustrated and described in my copending application forimprovements in fastener-inserting machines, Serial No. 469,432, filedJuly 21, 1930, of which the present application is a division.

In duplex eyeleting machines, one of the chief requirements is to insurefeeding the eyelets into each of the divisions of'a duplex raceway at arate no less than the rate at which the eyelets are removed from thedelivery end of the raceway. Experience has demonstrated that to insureaneven and sufficiently rapid rate of emission of eyelets from a hopperthe eyelets should standiwith their flanged ends on an inclinedsupporting surface while passing through an emission port in anupstanding wall of the hopper. The importance of these conditions ofemission has been recognized even to the extent of adopting costly andcumbersome expedients in duplex raceway construction solely for thepurpose of reversing the emitted eyelets in one of the series as theytravel along their division of the raceway. Even though these expedientshave been costly and cumbersome, they have been preferable to simplerand less costly constructions in which uniformity of the conditions ofemission hasbeen sacrificed by arranging the emission ports for one ofthe series of eyelets so that their relative inversion must occur beforeemission.

With regard to the conditions last explained, still another object ofthe invention is to provide for emission of two series of eyelets from ahopper under the most favorable conditions, identical as to both series,without requiring inversion of the emitted eyelets of one series tobring about'ultimate opposed relationship of those eyelets to theeyelets in the other series. I 1

A novel feature relating to this aspect of the invention consists in aneyelet-hopper having two oppositely inclined bottom walls and outletports formed and arranged to emit eyelets, and only those eyelets, thatstand on said walls in one certain relation thereto, means for feedingsuch eyeletsthrough the ports, and a duplex raceway the divisions ofwhich are arranged to conduct into parallel opposed relationship theeyelets so emitted. Preferably, as herein shown, the upper portions ofthe divisions of the raceway diverge upwardly and are equally thoughoppositely inclined, as are the bottom walls of the hopper which isarranged between and connects the aforesaid upper portions. Moreover, asshown, the emission ports are formed in cylindrical walls of the hopperwhich converge upwardly from the bottom walls and merge one into theother to'form one month into which the supply of eyelets may be poured.The opposite inclinations of the upper portions of the divisions of theraceway and the corresponding inclination of the axes of the eyeletswhen emitted avoids the necessity of inverting any of the emittedeyelets, since all that is required to bring about parallel but opposedrelationship of the eyelets of one series to those of the'other seriesis a short simple bend in one of the divisions of the raceway to reversethe direction of the inclination or pitch of the eyelets of one series.

Referring to the drawings,

Fig. 1 is a left-side elevation of a duplex eyelet-inserting machineprovided with eyelet-supplying means constructed in accord ance withthis invention; "Fig. 2 is a left-side elevation, partly in section, ofa duplex eyelet-hopper, a duplex raceway and related operatingmechanisms included in Fig. 1;

Fig. 3 is a top plan view projected from Fig. 2 showinga portion of theraceway and mechanism fer operating the delivery end thereof;

Fig. 4 is a top view, partly in section, of a latching device by whichthe raceway may be detachably secured to the frame of the machine;

5 Fig.6 is a sectional view in a vertical plane of the structure at thelower right-of Fig. 2;

Fig. 6 is a vertical section through the hopperin a planeindicated byline VI-,VI on s-2; 10 Fig'fi? is a view showing the hopper ineledicated by line VIIVII of- Fig. 2;

Eig.-.8-is.a vertical sectionali-view of the hopper in a plane extendingfrom front to rear; and

Fig.'"9 is-ai perspectivevview of the upper wpontion rof'roneof: twosimilarelinksz for'opi .erating the: hopper brushes respectively.

Although, for the purpose ofsetting forth e620 3 the: features 1 of:the: .fastenerrsupplying means F that constitute :the :essence of thisapplication, itawill'not bene'cessary'. te-include a completetidescription of the machine *illustrate'd zinFig. :11, 'a-brief 1-outline of the? general organization 2 .!Of that machine follows.

:Thenmain: frame ris hollowand encloses ableiparts,.'theright-handside-ofrFig. l. The flat base E80 21 of the frame isadapted-to stand on a bench.

.ash stationary shaft 22 mounted in the frame supports two idler zpulleysa. one -of which is r-r'epresented at:23,:over'which a=dr=ivingbelt24 runs to, impart motation to a receiving pulley 5 3 25eofa-'idisconnectible clutch. Upper and blower bearing members 26 enclosedin the frame 20; and bolted thereto provide bearings 11:40:; clutch is.controlled by a sliding pin or. bolt +30 whichmay be retracted-by atreadle chain and moved towardithe clutch by a spring (not shown).

'iTwoI opposedcpunches" 32 are arranged in 235 nalinement with eachother to punTch fastenerr-receiuingaholessimultaneously in the two tiquarters: ofia-zshoe-jupper. lTheopun'ches are J: carried: by a :plungers-;arranged to slide in beatings; formed- 1111 the arms :of a .U-shaped5% =framei33 that receives two distinct motions, tone frond front torear immediately; after the punches have been retracted fromthe-pun'chedholes, and the. other from right to left imzim'ediat'ely; after:fasteners have been inserted flandi clenched in the holes; the purposeof the -:latter motion being to impart a-step of feedi ing movement tothework and thereby space successivexfasteners onefrom-another. :Theouter endsof the punching plun'ge-rsare pro- 'v1dedi.wath. heads '34which are engaged by strikers 99 carried by operating level-s96.iBhesedeversaremounted on fulcrum pins 97 4 andreceive their operatingmotions from :tog- .cgle mechamsm (not shown) actuatedby cams 3565 105and 106.

strikers 99. "The ipunching devices 32 and the fastener-insertingdevices 43 are'operatcd alternately by the strikers 99 with Which theyare. placed. inregisterbythe forward. and

backward shifting ofithe. frame 33 as derived "from cams'59 and'60.SldGWlSQ movements vation and the raceway in cross-section as 1nofthisframe for feeding the work are derlved from cams'81 and 82 andcommunicated is caused by light levers 49 connected by a tensionspring50. J In like. manner, the punching deivices 1 are retracted byspring stressed levers.

' $The quarters of) ashoe-upper V are. inserted ubetweeni presses-feetand an intermediate I 1stationaryrw'ork-support 64. rMoreover, anintermediatei tongue 55 .carriedzby the frame 33 is aprovide dwith' an'embedded double-ended punch-bed' (not shown) and an embeddeddouble-ended fastenereupsetting. anvil (not shown). vvariousvpulleys,camsglevers. and other mov- I butis open at the frontwhich isat Theumechanismaab0ve described operates as follows the parts stand:in: the positions represented "inFi'g. latxthe beginning of each"cycle. *Fir'st, theistriker's'99 operate the punching devices '32.. andi immediately. re-

"cede. "Next, the framei33-moves .to .the'rear, f thereby placing thefastener-inserting devices 43 in register with the; punched-holes 'andalso in register 1 with the strikers 99. Now, the strikers operate thefastener-inserting deviccs to which fasteners'are presented 'Zfor:acam-sha'it 27 OII=Wh1Chi the aforesaid r I by -means hereinafterdescribed, but the CllltCl1u1S mounted. :The operation of theistrikersdwell-while the'devices 43 are :held

- thereby: against 7 the .fastenersi =j ust inserted! During this dwellthe frame 33 is moved from right to=left :the work thus receiving a stepI of feeding movementrfromvthe devices 43.

Finally,'-the"strikers 99 and thedevices 43 recede, and the frame 33returns to its initial position.

The present invention. provides improved indicated at 116 and 117,respectively.

These elements and others by which they are-connected and bracedconstitute aideta'chable unit which may be readily mounted on the frame20 and detached therefrom with very little loss of time. 4 Consequently,a plu 'rality of :detachable raceway units containing eyeletsofdifii'erent sizes, different colors or other" characteristics may bereadily interchanged inaccordance with the require- -ments ofsuccessivelots of work.

The divisions' 116 and 117 of the raceway 1 are parallel to each otherexcepttheir upperportions which diverge upwardly and lie in planes thatdiverge upwardly, the parallel portions being rigidly connected to eachating mechanism by which the delivery endof the raceway is moved to andfro. The

' construction is such that the act of mounting any one of aplurality ofdetachable raceway units on the means provided for that purpose alsoresults in coupling the movable section of the raceway to the racewayoperating mechanism, no additional act or operation being required toestablish the desired connection or. relation of the movable section andthe operating mechanism.

The raceway is supported in its operative position by two parallel dowelstuds 120 projecting horizontally from the left-hand side of the frame20. The two spacing blocks 118 are bored to receive the dowel studs asshown in Fig. 4. Interconnected latchies 121 mounted on the frame 20 andconnected thereto by pivot pins 122 are arranged to snap over outeredges of the blocks 118 and thereby maintain the raceway firmly againstthe frame 20. The latches are connected by a tension spring 123 whichmaintains them normally in latching position. The latches are alsoconnected by a pin-and-slot connection 124 whereby the movements of oneare communicated to the other. A knob 125 is formed on one of thelatches to provide convenient means by which the latches may beretracted to release the raceway.

The pivotal joint by which the stationary section and the movablesection of the raceway are connected comprises coaxial pivot pins 126and 127 (Fig. 5). The axis of these pins intersects the channels 128 ofthe two divisions of the raceway (see Fig. 3) but the pins arespacedapart to clear the lower division so that the eyelets in that divisionmay cross the axis of the joint without in" terference. A spacing block129 interposed between the two divisions of the movable section of theraceway is connected to the adjacent stationary block 118 by the pivotpin 126, while a reinforcing block 130 aflixed to the lower side of themovable section is connected to a stationary reinforcing member 131 bythe pivot member 127. The blocks 129 and 130 and the two divisions ofthe movable section are all rigidly clamped to each other by bolts 132,while the reinforcing .member 131 is-aflixed to the stationary sectionof the raceway by screws 133.

The pivot pin 127 is pinned to the block 130 and is utilized tocommunicate oscillatory motion to the movable section. For this purposea radially extending tongue 134 is formed on the lower end of this pivotmember. The tongue 134 constitutes one element of a tongue-and-groovecoupling, the complemental groove of which is formed in a head 135 of arock-shaft 136. The rock-shaft is journaled in a boss 137 formed on theframe 20 and is providedwith an arm 138 by which it may be oscillated.

'The mechanism for operating the movable section of the raceway is shownin Fig. 3. A cam 139 carried by the cam shaft 27 cooperates with acam-roll 140 carried by a lever 141. The lever is mounted on the fulcrumrod 63 and is held against the cam by a tension spring 142. A link 143communicates motion from the lever 141 to the arm 138 to 1 oscillate themovable section of the raceway.

hen the parts are in their initial positions as shown in Fig. 3, thetongue and" groove of the coupling 134, 135 are parallel to the dowelstuds 120. Consequently, when a raceway is being mounted on or demountedfrom the dowel studs by movement lengthwise of the latter, the tongue134 slides into or out of the groove in the head 135, as the case maybe, and when the raceway is caught by the latches 121 and thereby heldagainst the outer surface of the frame 20 the pivot pins 126 and 127 ofthe raceway are maintained in coaxial relation to the rock-shaft 136.Moreover, the dowel studs 120 maintain the tongue 134 in the groovemember 135 and thus preserve the coupled relation of the raceway and theoperating mechamsm.

In duplex eyeleting machines in which botheyelets of a pair are insertedby movement toward each other, it is necessary to deliver the twoeyelets in relatively reverse positions. That is, the barrels of theeyelets must be toward each other and the flanges must be away from eachother. Moreover, when two series of eyelets are to be deliveredrespectively to the fastenerein serting devices of a duplex machine, itis desirable to supply them under identical conditions to insure equalreplenishment of the two series. With regard to duplex raceways thatreceive both series of eyelets from a common mass stored in a hopper,equality in the feeding of the two series has constituted one problem,and the delivery of the eyelets in relatively reverse positions hasconstituted another problem. For example, in some prior constructionsthe eyelets of one series have been obliged to stand with their flangesat their upper ends to be fed out of the hopper while the eyelets of theother series have been obliged to stand with their flanges at theirlower ends to be fed out.

I In such cases, the feedlng conditions of'the two series "have beendissimilaraand the rate of feeding has -therefore beenunequal.

In other prior-constructions the eyelets of the twoseries'have stood inthe same position in a common inclined plane while being fed from thehopper, but theirdelivery from the hopper-hasrbeen at opposite sides ofthe :;axis of a-rotary brushwor. feeding member. Under theseconditionsthe eyelets'd'elivered from one side of the hopper have been pro- 1pelled by-downward inclined movement of the brush into thezmass ofeyelets while those delivered'from theopposite side of the hopuper havebeen v:propelledby upward inclined :movementof the brush out of themass. Here again, the feeding conditions have been dis- I similar andthe rate of. feeding has therefore =been unequal.

l Vithaa' view-to supplying two series of -cyelets under similarconditions and with :equal' rates of feeding fronia common mass in ahopper to a duplex raceway, the present '25! 1 tionwhich at the sametime, causes the eyelets ofthe two $811887 to be equally butopinvention. provides an improved construcpositely inclined as they passthrough the outlets from the hopper to their respective er'ablyoblong'rather'than circular. 'This fordivisions of the raceway.

As shown: in Figs; 1 and 2, the lower division 117:0f the raceway isall-in one inclined plane, while the movable section and the low- -erportion of the stationary section of the -upper'd-ivision' 116 arelikewise all in one inclined'plane parallel to the plane of thedivision'117. FThe'upper portion'145 of the division: 1 16i and' thecorresponding portion of lllleiCllV-lSlOII 117 diverge'upwardly-and are-not onlyoppositely inclined but have equal I steepness or slant. A.transverse bend 146 in the-division 116 provides for the diver- -genceand parallelism mentioned above.

The shape-of the hopper 115 resembles that of a funnel although itsmouth 147 is prefmation facilitates filling the hopper withoutspilling'any eyelets. Its bottom walls 148 (Fig. 8) are flat andoppositely inclined and converge'downwardly, their angles of inclinationbeing equal. These walls are screwed against the lower ends of annularwalls 149 by'which the massed eyelets in the hopper are localizedadjacent to two feeding brushes. The walls 148 are bored to providebearings for oppositely inclined shafts 150 which eX- 'tend throughthem. Each shaft carries a brush 151 at its inner end and aratchet-wheel 152 at its outer end and each is provided with anoscillatory pawl-carrier 153 loosely mounted thereon between theratchet-wheel and the adjacent Wall 148. Each pawl-carrier 153 carriesan operating pawl 154 (see Fig; 7) and-a leaf-spring 155' by which thepawl is heldagainst the ratchet-wheel. The

pawl is connected to the pawl-carrier by; a pivot member 170.

The annular walls 149 of thexhopper' are provided with notches 156through which the barrelsof the eyeletsmay pass, the'teeth be- 1 tweenthe notches being spaced from thebottom walls 148 sufficiently to clearItheflanges of the eyelets. that stand with their-"flanged ends on thewall 148. Each series ofnotches 156' forms communication from: theinterior of the hopper to a division of the raceway (see Fig. 7). Eachof thebrushes-151 is rotated in a directionithat causes 'u pwa-rd travelof the tufts as the latter sweep the correctly positioned eyelet throughthe notches or outlets 156, the conditions .iurider which the eyeletsare fed out of. the hopper being therefore similar with respect to thetwodivi'sions of the raceway. The illustrated mechanism for operatingthe brushes 151 receives. motion from the lower hammer 96 (see Fig. 2)..'-An extension arm 158 rigidly: relatedto. thehammer communicatesmotion through a link 159-to a bell crank lever 160. This'leverismounted on the frame 20 by a fulcrum or pivot pin 161.

Two links 162. communicate the .toran'd-rfro movements ofthebell-crankleverto; the pawl-carriers 153, respectively. The'pivotpins. 163 by which these links are-connected to the bell-cranklever arelocated at' poi'nts ninety degrees from each otherwith respect to theaxis of the fulcrum 161,2 and the links are arranged in crossed relationso that when is provided with a circumferential. groove 165 adapted toreceive the inner end of-a detent 166 (see Fig. 7), the-detent beingcarried by a leaf-spring167 attached-tosthe pawl-carrierand normallyprojected into a socket 168 formed in the pawl-carrier for. thereception of the stud 164. The leaf-spring 167 is extended a-shortdistance beyond the detent to provide a finger-piece by which the detentmay be retracted to release the stud 164 whenever it is desired todisconnect the link 162 from the raceway structure.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a duplex eyeleting machine, an eyelet-hopper having two oppositelyinclined bottom walls andupstanding walls in'which .with a connectingstud 164 permanently af- 5110 fixed thereto, as shown in Fig. 9. Thestud outlet ports are formed and arranged to emit eyelets, andonly thoseeyelets, that stand on said bottom walls respectively in one certainrelation. thereto, means arranged to feed eyelets through saidports, anda duplex raceway the divisons, of which are arranged to conduct intoparallel opposed relationship the eyelets so emitted.

2. In a duplex eyeleting machine, an eyelet-hopper having two oppositelyinclined bottom walls and cylindrical walls extending upwardly from saidbottom walls respectively, said cylindrical walls having outlet portsformed and arranged to emit eyelets, and only those eyelets, that standon said bottom walls respectively in one certain relation thereto,rotatable eyelet brushes arranged to sweep eyelets through said ports,mechanism arranged to operate said brushes, and a duplex raceway thedivisons of which are arranged to conduct into parallel opposedrelationship the eyelet so emitted.

3. In a duplex eyeleting machine, an eyelet-hopper having two oppositelyinclined bottom walls and oppositely inclined cylindnical wallsextending'upwardly from said bottom walls respectively, said cylindricalwalls having outlet ports formed and arranged to emit eyelets, and onlythose eyelets, that stand on said bottom walls respectively in onecertain relation thereto, rotary brushes arranged to sweep eyeletsthrough said ports, mechanism arranged to operate said brushes, and aduplex raceway the divisions of which are arranged to conduct intoparallel opposed relationship the eyelets so emitted.

4C. In a duplex eyeleting machine, an eyelet-hopper having twooppositely inclined bottom walls and oppositely inclined cylindricalwalls extending upwardly therefrom, rotatable eyelet-brushes arrangedabove but adjacent to said bottom walls respectively, the axes of saidbrushes being oppositely inclined, mechanism for turning said brushes,said cylindrical walls having outlet ports adjacent to the upwardlymoving portions of said brushes respectively, and said ports beingformed and arranged to emit eyelets, and only those eyelets, that standon said bottom walls respectively in one certain relation thereto, and aduplex raceway arranged to conduct into parallel opposed relationshipthe eyelets so emitted.

5. In a duplex eyeleting machine, a funnelshaped eyelet-hopper havingtwo oppositely inclined flat bottom walls that converge downwardly andtwo oppositely inclined cylindrical walls that converge upwardly fromsaid bottom walls respectively and merge one into the other, saidcylindrical walls having outlet ports formed and arranged to emiteyelets that stand on said bottom walls respectively, means arranged tosweep eyelets through said ports, and a duplex raceway the divisions ofwhich are arranged toconduct eyelets emittedfthroughsaid ports.

6. In a duplex eyeleting machine, an eyelet-hopper having two angularlyrelated bottom walls and outlet ports arranged to emit eyelets lying onsaid walls respectively, two brushes arranged to sweep eyelets throughsaid.ports,'said brushes being arranged to turn about angularly relatedaxes, and brush-operating mechanism comprising linksoperativelyconnected-to said brushes respectively, andan oscillatory actuatingmember to which both of said links are connected and by which theyare-reciprocatedto operate said brushes. 7. In a duplex eyeletingmachine, a duplex racewaythedivisons of which confront each other andhave oppositely inclined upperportions that lie in upwardly divergentplanes, a hopper arranged between and connecting saidoppositely inclinedportions, said hopper having outlet ports formed and arranged to emitoppositely inclined eyelets to said portions respectively and said portsbeing simi larlyrelated to said portions respectively to render alikethe conditions of emission to both of said portions, and means arrangedto stir-the eyelets in said hopper. I a v I8. In a duplex eyeletingmachine, a duplex raceway the divisions of which have equally butoppositely inclined upper portions that diverge upwardly, a duplexhopper arranged between and connecting said portions, said hopper havingoppositely inclined bottom walls in cooperative relation to saidportions respectively and having outlet ports arranged to emit eyeletsto said portions respectively, and means arranged to stir the eyelets insaid hopper.

' 9. In a} fastener-inserting machine, a hopper having two" oppositelyinclined bot tom walls and oppositely inclined side walls extendingupwardly therefrom, rotatable brushes arranged to sweep fastenersupwardly on said bottomwalls, said side walls having outlet ports formedand arranged to emit fasteners, and only those fasteners, that stand onsaid'botto-m walls respectively in one certain relation'thereto atpoints where the fasteners are swept upwardly by} said brushes, meansarranged to operate'said brushes, and means arranged to conducttheemitted fasteners from said ports to points of delivery. 10. Ina duplexfastener-inserting machine, a frame, a duplex raceway the. divisionsofwhich comprise confronting portions spaced apart and secured tointerposed connecting means, said frame and said connecting means beingprovided with c-omplemental dowels and sockets by which to mounttheraceway, and means arranged to secure the racewayso mounted. 1

11. In a duplex fastener-inserting machine, a frame, a duplex racewaythe divisions of which comprise confronting portions spaced apart andsecured to interposed; connecting means, said connectingmeans havingdowelholes extending transversely between the divisions of the racewayand said frame being provided with dowels projecting horizontally toenter said holes, and means arranged to secure the raceway on saiddowels.

12. In a duplex fastener-inserting machine, a frame, a duplex racewaythe divisions of which comprise confronting portions spaced apart andsecured to interposed connecting members, said members being spacedapart lengthwise of the raceway and having dowel holes extendingtransversely between the divisions of the raceway, raceway-supportingdowels secured to and projecting horizontally from said frame to entersaid holes, and means mounted on said frame to engage the raceway andthereby secure it in an operative position on said dowels.

'13. A duplex fastener-supplying unit comprising a duplex raceway thedivisions of which have upper portions that lie in upwardly divergentplanes and lower portions that lie in confronting relation, meansinterposed between and connecting said confronting portions, and ahopper arranged between and connecting said upper portions, said hopperhaving outlet ports arranged to emit fasteners to saidupper portionsrespectively, and said interposed connecting means having provision formounting said unit on supporting means of a duplex fastener-insertingmachine. 14. In a duplex fastener-inserting machine provided withmechanism arranged to insert fasteners in opposed relation, aduplexraceway arranged to supply fasteners in opposed relation to saidmechanism, the divisions of saidraceway having portions that lie inupwapdly divergent planes, and a hopper arranged between said portionsand having outlet ports arranged to emit fasteners to said portionsrespectively.

15. In a fastener-inserting machine having a frame andfastener-inserting mechanism arranged therein, a detachable raceway forsupplying fasteners to said mechanism, said raceway and said frame beingprovided with cooperative dowels and sockets by which to mount theraceway in cooperative relation to said mechanism, and a plurality ofretaining devices movably attached to said frame and'arranged to operateautomatically to fasten spaced portions of the raceway in certainpredetermined positions.

16. In a fastener-inserting machine having a frame andfastener-inserting mechanism arranged therein, a detachable raceway forsupplying fasteners to said mechanism, said raceway and'said frame beingprovided with cooperative dowels and sockets by which to mount theraceway in cooperative relation to said mechanism, and a plurality ofretaining devices movably attached to said frame and interconnected witheach other to part ake in common of operating inov'emenu saijdfde:

vices being arranged to fasten spaced portions of the raceway in certainpredetermined positions. f

In testimony whereof I have signed my 7 0 name to this specification.

SYLV'ESTER LEO. GOOKIN.

